. The Cactaceae : descriptions and illustrations of plants of the cactus family. 192 THE CACTACEAE. 7. Malacocarpus apricus (Arechavaleta). Echinocactus apricus Arechavaleta, Anal. Mus. Nac. Montevideo 5: 205. 1905. Cespitose, in clusters of 2 to 10, subglobose, 3 to 5 cm. in diameter, umbilicate at apex, densely covered with interlocking spines; ribs 15 to 20, somewhat curved, more or less tuberculate; areoles orbicular, 3 to 4 mm. apart, tomentose when young, becoming naked in age; radial spines 18 to 20, grayish yellow, flexible; central spines several, 4 of the larger ones reddish at base;
. The Cactaceae : descriptions and illustrations of plants of the cactus family. 192 THE CACTACEAE. 7. Malacocarpus apricus (Arechavaleta). Echinocactus apricus Arechavaleta, Anal. Mus. Nac. Montevideo 5: 205. 1905. Cespitose, in clusters of 2 to 10, subglobose, 3 to 5 cm. in diameter, umbilicate at apex, densely covered with interlocking spines; ribs 15 to 20, somewhat curved, more or less tuberculate; areoles orbicular, 3 to 4 mm. apart, tomentose when young, becoming naked in age; radial spines 18 to 20, grayish yellow, flexible; central spines several, 4 of the larger ones reddish at base; flowers yellow, 8 cm. long; flower-tube densely woolly and setose on the outside, very stout. Type locality: Punta de la Ballena, Uruguay. Distribution: Uruguay. We know this plant only from description and illustration, from which the above description has been drawn. Illustration: Anal. Mus. Nac. Montevideo S: pi. 10, as Echinocactus apricus. Figure 204 is copied from the illustration above Fig. 204.—Malacocarpus apricus. Fig. 205.—Malacocarpus tabularis. 8. Malacocarpus concinnus (Monville). Echinocactus concinnus Monville, Hort. Univ. 1: 222. 1839. Echinocactus joadii Hooker in Curtis's Bot. Mag. 112: pi. 6867. 1886. Echinocactus concinnus joadii Arechavaleta, Anal. Mus. Nac. Montevideo 5: 204. 1905. Simple, globular or somewhat depressed, 5 to cm. in diameter; ribs about 16 to 20, somewhat tuberculate, light green; young areoles white-felted; spines 10 to 12, spreading, setaceous; radial spines 5 to 7 mm. long; central spines 1 to 4, one much longer, spreading or turned downward; flowers large, 7 cm. long; outer perianth-segments narrow, acute, reddish; inner perianth-segments oblong, yellow, except the reddish tips, acute; stigma-lobes bright red; scales on the ovary hairy in their axils; perianth-tube slender. Type locality: Not definitely cited. Distribution: Southern Brazil and Uruguay. We know this species only from description and Ple
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